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The graph given below shows the variation of boiling points in homologous series of alkenes.

Give possible reasons for the variation of boiling points.

Solution:

The three isomers of pentane are:

The graph shows that the boiling point increases as the number of carbon atoms in the homologous series increase. This is because boiling point increases with increase in molecular mass.

....

In that question, its written ALKENES and the answer shows Pentane, Hexane & Heptane.

Also, how is the three isomers of pentane be Pentane, Hexane & Heptane?

 

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